Join in expert discussion on special and general relativity discussion. Relativity is the dependence of various physical phenomena on relative motion of the observer and the observed objects.
Threads
Graduate Why extremal aging, not just maximal? (for an inertial body in spacetime)
- Colin Mitch
- · Replies 7 ·
Graduate Large black holes and information
- Elroch
- · Replies 6 ·
High School Does relativity have any day to day life applications?
- goodabouthood
- · Replies 25 ·
Graduate Physical meaning of tensor contraction
- zonde
- · Replies 1 ·
Undergrad Is the Milky Way galactic blackhole slowly sucking us in?
- arabianights
- · Replies 3 ·
Undergrad Why does time slow down the faster you go?
- goodabouthood
- · Replies 98 ·
Graduate What is the relationship between the Higgs boson and gravity?
- jnorman
- · Replies 10 ·
Graduate Does energy curve spacetime, or only mass?
- joris_pixie
- · Replies 1 ·
Graduate How do affine connections work with spinors and non-tensors?
- thehangedman
- · Replies 2 ·
Graduate Why Newtonian gravity breaks down inside an event horizon
- John15
- · Replies 7 ·
Graduate Spacetime, physical or not really?
- ZirkMan
- · Replies 28 ·
Graduate The Validity of Force and Point Particles in Special Relativity
- atyy
- · Replies 62 ·
Undergrad E=mc^2, but nothing can travel faster than light?
- Cosmic Philo
- · Replies 6 ·
Undergrad How can light be affected by gravity if it has no mass?
- saderlius
- · Replies 49 ·
Graduate Gravitational Redshift really verification of GR?
- thehangedman
- · Replies 2 ·
Graduate Twin Paradox: Solving Confusing Explanations
- Snip3r
- · Replies 2 ·
Graduate Does gravity's strength vary if its speed varies across the universe?
- lnsanity
- · Replies 5 ·
Graduate Energy in two different frames
- Lawrencel2
- · Replies 2 ·
Graduate How can B claim that A measures light speed as c when A is moving at c/2?
- mananvpanchal
- · Replies 9 ·
Graduate How do I go about learning GR?
- Frogeyedpeas
- · Replies 6 ·
Graduate Can Forces Be Interpreted as Christoffel Symbols in General Covariance Contexts?
- pervect
- · Replies 10 ·
Graduate Wormholes aren't ruled out in the wonderful universe of relativity
- Skynt
- · Replies 3 ·
Graduate Questions regarding relativistic momentum
- nos
- · Replies 1 ·
Graduate C maximized in its own direction, so v > c possible ?
- digi99
- · Replies 28 ·
Graduate Particle Lifetime in Gravity: Experimental Evidence?
- Xilor
- · Replies 7 ·
Graduate Time, Light, and Relativity: Photons from the Past
- dtyarbrough
- · Replies 4 ·
Graduate We can travel faster that light?
- Bonoman
- · Replies 5 ·
Graduate Alternate derivation of Lorentz Trans.
- timetraveldude
- · Replies 38 ·
Undergrad At what speed would one day = one year?
- goodabouthood
- · Replies 6 ·
Graduate Analogy between centrifugal force and gravity
- gabeeisenstei
- · Replies 10 ·
Undergrad What if something went faster than light?
- Willis666
- · Replies 7 ·
Graduate Where Do 2nd Order Terms in Gauge Transformation Come From?
- matt91a
- · Replies 1 ·
Graduate Photon interaction with gravity.
- MathematicalPhysicist
- · Replies 2 ·
Graduate How can the rest observer conclude the photon travels at an angle?
- Snip3r
- · Replies 6 ·
Graduate Antimatter time dialation/singularities
- d0wnl0w
- · Replies 5 ·
Graduate The effect of external masses on internal black hole geometry
- Elroch
- · Replies 17 ·
Graduate Relativity, ultimate rigidity and the speed of light.
- najd
- · Replies 15 ·
Graduate Does General Relativity actually explain gravity?
- nhmllr
- · Replies 9 ·
Graduate Some questions about time dilation (muon etc.)
- digi99
- · Replies 8 ·
Graduate Does the twin paradox require returning to the same location?
- digi99
- · Replies 17 ·
Graduate What is the result of this laser/time dilation scenario?
- Acumen
- · Replies 12 ·
Graduate Solving the Geodesic equations for a space
- Lyalpha
- · Replies 1 ·
Graduate What do x, v, and t represent in the Lorentz transformation x' = γ(x - vt)?
- goodabouthood
- · Replies 8 ·
Graduate Can time be proven to exist if it can't be observed directly?
- JackYoung
- · Replies 16 ·
Graduate Matter Lagrangian for perfect fluid
- ramparts
- · Replies 5 ·
Graduate Can a star be seen approaching a black hole forever?
- atomthick
- · Replies 25 ·
Graduate How is the Riemann tensor proportinial to the curvature scalar?
- Lyalpha
- · Replies 2 ·
Graduate How does the four-momentum of a photon change in general relativity?
- thepopasmurf
- · Replies 13 ·
Graduate CERN: Accelerating Particles to 99.99% Speed of Light
- Rikendogenz
- · Replies 6 ·
Graduate The nature of causality in special relativity (not faster than light travel)
- Functor97
- · Replies 2 ·
Undergrad How does speed affect time in Einstein's theory of relativity?
- Snip3r
- · Replies 1 ·
Graduate How can we define the age of the universe if time is relative?
- smotpoker
- · Replies 5 ·
Graduate Time Dilation at Center of a Neutron Star
- PatrickPowers
- · Replies 2 ·
Graduate If an electron falls into a black hole?
- zeromodz
- · Replies 2 ·
Graduate Does Gravitational Time Dilation Affect Planetary Geology?
- gonzo
- · Replies 30 ·
High School Measuring a Rod in a Running Train: Why?
- vinayjain
- · Replies 3 ·
Graduate Relativity interstellar travel question
- Phymath
- · Replies 6 ·
Graduate Infinite speeds would defeat time keeping
- lalbatros
- · Replies 6 ·
Graduate How to find that the universe is expanding from general theory of relativity
- manvirsingh
- · Replies 7 ·
Graduate How Does Time Dilation Affect Aging in Moving Frames?
- mananvpanchal
- · Replies 4 ·
Graduate Do Lie and Covariant Derivatives Relate in Vector Field Manipulation?
- wandering.the.cosmos
- · Replies 9 ·
Graduate Changes in mass and length at high speed
- jamesnb
- · Replies 19 ·
Graduate Modified universal law of gravity in GR lecture notes
- SBC
- · Replies 1 ·
Graduate What is the significance of velocity in relativistic electromagnetism?
- Criticalsandy
- · Replies 3 ·
Graduate Initial conditions for BH in GR
- unih
- · Replies 11 ·
Graduate What is an invarient observable in GR
- Naty1
- · Replies 5 ·
Graduate The set of Lorentz boosts and space rotations form a group
- Demon117
- · Replies 4 ·
Graduate Painleve chart for FRW spacetime
- PeterDonis
- · Replies 7 ·
Undergrad Observing and Experiencing Speed of Light
- graviphoton
- · Replies 14 ·
Graduate Is there mass without momentum?
- azabak
- · Replies 2 ·
Graduate How does gravitational time dilation increase the spacetime interval?
- gabeeisenstei
- · Replies 7 ·
Graduate Why is the speed of light same in all reference frames?
- akshay.wizard
- · Replies 10 ·
Graduate SR, Inertial frames, Movement, Testing
- goodabouthood
- · Replies 6 ·
Undergrad How would Earth's time slow down?
- goodabouthood
- · Replies 7 ·
Graduate How light's constant speed derives special and general relativity
- Eugene381
- · Replies 15 ·
Graduate The Poincaré Group and Geodesics in Minkowski Spacetime
- Demon117
- · Replies 5 ·
Graduate Time for object to fall length of 10m rope, assuming g=10m/s
- gabeeisenstei
- · Replies 2 ·
Graduate How fast can light change its direction?
- bmc001
- · Replies 9 ·
Graduate What is the velocity of a photon?
- gbfmgbfm
- · Replies 80 ·
Graduate Are My Calculations for Proper Time on a Rocket in General Relativity Correct?
- Passionflower
- · Replies 4 ·
Graduate Does the curvature of space-time create the illusion of distance shrinking?
- mdl
- · Replies 19 ·
Graduate Speed of light between a source and target moving wrt to each other
- Passionflower
- · Replies 3 ·
Graduate Four-Momentum Invariant and Conservation Laws Yielding Contradictory Results
- n+1
- · Replies 4 ·
Graduate What do I see wrong here ? T2 = T1(1 - V/C)
- digi99
- · Replies 45 ·
Undergrad Why light is remains massless even if travelling w/ the fastest velocity?
- 121910marj
- · Replies 4 ·
Graduate Reciprocity of Time Dilation in General Relativity
- blueberrynerd
- · Replies 3 ·
Graduate General confusion with four velocity and four acceleration
- HJ Farnsworth
- · Replies 7 ·
Graduate Acceleration/deceleration questions
- JSEBorg
- · Replies 2 ·
Graduate Why didn't Michelson-Morley use electrons instead of light?
- A Dhingra
- · Replies 11 ·
Graduate Do Corners Experience Stress in Curved Space?
- mrspeedybob
- · Replies 2 ·
Undergrad Does Moving Train See Stationary Observer at .6c? - I'm Not Sure
- goodabouthood
- · Replies 3 ·
Graduate Is time slowing down or is it just taking a longer amount time?
- parkerren
- · Replies 2 ·
Graduate Wikipedia quote on gravitational time dilation
- enfield
- · Replies 3 ·
Undergrad Mass increasing as velocity approaches c
- Routaran
- · Replies 8 ·
Graduate A Relativity Experiment I'd Like to See
- PatrickPowers
- · Replies 21 ·
Graduate Space time curvature caused by fast electron
- matthias31415
- · Replies 59 ·
Graduate Trying to understand spacetime curvature
- wvguy8258
- · Replies 15 ·
Graduate Block Time vs Q. Indeterminacy
- stglyde
- · Replies 109 ·
Graduate Travel faster than speed of light. According to what reference frame?
- cbell39
- · Replies 3 ·
Graduate Question on Black Hole Metrics
- skippy1729
- · Replies 2 ·